Quote:
Originally Posted by Berto210
does anyone have the issue where the SES light comes on, then a few days later, it goes off..then a month or so later, it comes back on...few days later its off...anyone? I took it to Autozone and it's the O2 sensor bank 2 i think they said. But if its bad why does the SES light go on and off??
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The O2 sensor can come back in range. There are several codes associated with the O2 sensor (see
here) and if they come back in range the code can reset. I don't know the exact mileage or duration for it to reset and if it is only for specific codes, but that could have been what happened.
For example, I had P0138 and P0139 for the rear O2 sensor. After about a week the SES light went off, presumably because there was nothing wrong in the first place (my MAF was on the fritz).
Best thing you can do is when the SES light comes back on pull the code. It is not bad if it goes on and off (caveat, it is bad if you reset it without diagnosing and fixing the problem). How many miles are on your max?